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arXiv · 1112.5684

Nucleosynthesis in core-collapse supernova explosions triggered by a quark-hadron phase transition

Nobuya Nishimura·Tobias Fischer·Friedrich-Karl Thielemann·Carla Fröhlich·Matthias Hempel·Roger Käppeli·Gabriel Martínez-Pinedo·Thomas Rauscher·Irina Sagert·Christian Winteler
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Abstract

We explore heavy element nucleosynthesis in the explosion of massive stars which are triggered by a quark-hadron phase transition during the early post bounce phase of core-collapse supernovae. The present study is based on general relativistic radiation hydrodynamics simulations with three-flavor Boltzmann neutrino transport in spherical symmetry, which utilize a quark-hadron hybrid equation of state based on the MIT bag model for strange quark matter. The quark-hadron phase transition inside the stellar core forms a shock wave propagating towards the surface of the proto-neutron star. The shock wave results in an explosion and ejects neutron-rich matter which is piled up or accreting on the proto-neutron star. Later, during the cooling phase, the proto-neutron star develops a proton-rich neutrino-driven wind. We present a detailed analysis of the nucleosynthesis outcome in both neutron-rich and proton-rich ejecta and compare our integrated nucleosynthesis with observations of metal poor stars.

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Nobuya Nishimura, Tobias Fischer, Friedrich-Karl Thielemann, Carla Fröhlich, Matthias Hempel, Roger Käppeli, Gabriel Martínez-Pinedo, Thomas Rauscher, Irina Sagert, Christian Winteler. 2011-12-24. Nucleosynthesis in core-collapse supernova explosions triggered by a quark-hadron phase transition. https://doi.org/10.1088/0004-637x/758/1/9

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